电力系统及其自动化学报2018，Vol.30Issue(6)：66-72,7.DOI:10.3969/j.issn.1003-8930.2018.06.010
提高单相光伏并网系统低压穿越能力的电流解耦控制策略
Current Decoupling Control Strategy for Improving the Low-voltage Ride Through Capability of Single-phase Photovoltaic Grid-connected System
涂睿 1曹一家 1李勇 1丁立国 1李世军1
作者信息
- 1. 湖南大学电气与信息工程学院,长沙 410082
- 折叠
摘要
Abstract
To avoid serious consequences caused by the off-grid of a single-phase photovoltaic grid-connected system during grid voltage sags,a low-voltage ride through(LVRT)control strategy is proposed based on single-phase dq cur?rent decoupling. With reference to the low-voltage fault related technical standards on power grid both at home and abroad as well as according to the real-time detected depths of grid voltage sags,the proposed strategy controls and regu?lates the active current and reactive current reference through the dq decoupling of grid current. In this way,the corre?sponding reactive power can be injected to the grid and help to recover the grid voltage,achieving the objective of LVRT. Finally,the feasibility and effectiveness of the proposed method are verified by tests conducted on a system simu?lation model .关键词
单相光伏/并网系统/逆变控制/无功补偿/低压穿越Key words
single-phase photovoltaic/grid-connected system/inverter control/reactive compensation/low-voltage ride through分类
信息技术与安全科学引用本文复制引用
涂睿,曹一家,李勇,丁立国,李世军..提高单相光伏并网系统低压穿越能力的电流解耦控制策略[J].电力系统及其自动化学报,2018,30(6):66-72,7.
